Power-generating system.



-' H. LEMP.

POWER GENERATING SYSTEM.

APPLICATION yum) JULY 15, 1899.

Patented Nov. 10, 1908.

in v 5 w Maggi g Wbn-esses 'nvenbof: Hermann Lemp,

HERMANN LEHP, OF LYNN, MASSAOHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TOGENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

POWER-GENERATING SYSTEM.

To all whom it may concern:

Be it known that I, HERMAN LnMr, a citi Zen of the United States,residing at liynn, county of Essex, State of Massachusetts, haveinvented certain new and useful Improvements in Power-GeneratingSystems, of which the following is aspeciiication.

- My inventionv relates to power generating systems in general but isillustrated in the form particularly used for operating auto-v mobiles,in which service the demand for energy is subject to sudden and widevariations. The energy required to drive an automobile variesprincipally with the speed, the weight carried and the character of theroute traveled.- In order to operate such avehicle with a maximum degreeof economy, the supplies olfuel and water to the generat-. ing apparatusshould vary with the load on the engine and in substantially the samedegree.

of a power generating system of improved construction which will operatewith the de-- sired economy under the varying demands made upon itforenergy and will require a minimum of care and attention on the partof the operator.

,In carrying out my invention, a tank or other source of fuel supply isplaced under a relatively small initial pressure or head sufitieient tosupply the fire chamber or burner of the boiler or other vaporgenerating apparatus when the fire is banked. A power and imparts thepressure necessary to de sure therein.

water pump is in connection with a regulapump is employed to impartservicepressure to the fuel. A regulator controlled by the vaporpressure on the engine ormotor is pro vided to regulatethe effectivedelivery of the fuel; pump in substantial accordance with the demand forenergy Another pump draws a supply of water from a tank or other sourceliver it to the boiler against thevapor pres- The delivery conduit ofthe tor, subject-to the va or pressure in the boiler, which controlstlie effective delivery of the pump in general accordance with thedemand for energy.- The pumps are of substantial size, require nocareful adjustments, and are capable at all times of furnishing anexcess of water and fuel; the regulating devices being arranged toautomatically take care of the excess. This arrangement is a verysatisfactory one and eliminates objec- Specifieation of Letters Patent.

Application filed July 15, 1809. $eria1No. 723,900.

The ob'ect of the invention is the rovision- "the exhaust pass'es fromthe engine.

Patented. Nov. 10, 1908.

tionable conditions which would result it the system were designed tosupply water and fuel in exact quantities with respect to the demand. J

In the accompanyin g drawing, which represents an'einbodiinent of myinvention, Figure 1 is a diagrammatic representation of a systemcomprising a steam engine, boiler and the necessary pumps, tanks,piping, etc.,

and'Fig. 2 is a sectional view of a regulatingvalve.

The boiler shown consists of a seamless tube A of suitable bore, coiledor bent in any desired manner so as to present a large surface to theburner flame. The boileris preferably divided into. sections and theinner .end of one'section is connected to the outer end of anothersection, the main steam pipe being co'niiected'to ap roxiniately themiddle of theboiler. A )oiler constructed in this manner possessescertain features of advantage which are set forth in another application of mine S. N. 6805, filed Feb. 28, 1900, but the invention isnot limited to this particular form of boiler. Other forms orconstructions may be used, if desired.

Surrounding the tube or tubes and consti- I tuting a fire chamber is acasing or lining B,

composed of fire brick or other heat resisting material which confinesthe burner flame and at the same time shields the body of the vehicle orother sup ort from excessive heat.

Surroundingthe re-brick lining is a 'metallic casing C having a suitablebottom and a top provided with an extension C containing'an openingthrough which the prod-' openings O are rovided in the sides of thecasing C throug which the air may enter, as 1Hd10lt6d-by the arrows, tocombine with the fuel. The construction and, arrange,

ment of the up and down flues isnot claimed herein, as it forms thesubject matter of a separate appjlication, filed by me November 2, 1900an earing Serial No. 35254:.

- Anysuitable type of-engine maybe' employed in connection with myinvention, the one shown being a single acting vertical engine. One endof the cylinder E is connect- I ed with the boiler by pipe F, and theadmission of steam thereto 1s regulated by the throttle G. The exhaustfrom the cylinder passes through pipe H to the chamber D over theboiler, thence'to the external air by the or approximately constantspeed either by or .maximum amount 0' water re uire down flue D I Fortheurlpose of supplying water to the boiler and e independent of theengine,as certain advantages will follow in these cases.

As illustrated-in. the drawing, H represents awater ump and Ian oil pumppreferably 0f the displacement type. the cylinder of the water pump H?is connected to the boiler by the ipe H and the other end is connected to t 'e water tank J by the pipe H. An air chamber or dome H isoperatively connected to the pipe H Connected to the water pipe H is arelief valve V, of any suitable construction, which. is designed to takecare of the excess of Water supplied by the pum and'is set to ive the bythe boiler. Leading from the relie' valve to the Water tank J is a ipe Vthat conveys the excess of water bac to the tank. v

A small manually actuated pump O is used to give an initial Waterpressure at the time of starting. Shunting the cylinder H K through thepipel and connected to the pipe H at a point opposite the dome, isa-pipeH This pipe is provided with a check valve h so thatwater can be forcedinto the boiler by the manually ac-.

tuated pump; this arrangement being employed when for any reason thepump H is not running.

One end of the cylinder of the oil pumpI is connected to the oil tank bythe pipe I and the other end is connected to the oil feed pipeConnecting the pipes 1 and I is a short piece of pipe containing thecheck valve 1 This check valve is so arranged that it permits the liquidfuel to flow from pipe I to pipe I underthe action of the air pressurein the tank N but prevents its passage in the opposite direction underpressure from the pump. In addition, the

to the burner, two umps are provided which are either driven irectly byOne end ofphr Fig. 2, in which L represents the casing or I base, andmounted therein is a diaphragm L Securedto the casing is a cylinder Lcontaining a piston L arranged to press on the diaphragm L and cause thelatter to en' gage a seat L and close the Opening l'eading to pipe K.

To prevent leakage around the piston'an'elastic packing -Z is employed,

which completely surrounds the piston and is firmly seated between a nutand a shoulder'on'thecylinder. The ratio of the areas of the diaphragmand; plunger are, roughly, as one to six, but this ratio can, of course,be

made anything else depending u on the rela tive dimensions of the burnerand engine, but once this ratio is determined it need not be altered,the throttle valve R being used for final adjustment. Secured to theupper end of the cylinder is a pipe M which isv directly y, connected tothe steam pipe between the' throttle valve Gnand the engine, conse-.quently the steam pressure in the pipe M cor- When for responds to thaton the engine.

Ppressure in the pipe 'anyfreason the relative M falls below that in tagm rises and permits a certain amount of the liquid fuel to pass frompipe K to pipe e pipe K, the dla-i K and thence throu h the pipes 1 ,1and 1 thereby forming a. ocal circuit. As soon as the difference inpressure between the pipe K and the pipe 'M'ceases, all of the oil willflow from the tank to the burner.

Oil or other fuel is supplied tothe burner from a tank N, and in orderto furnish'an initial pressure at the time of starting the engine asmall handpump N is employed this pressure is ordinarily about fivepounds,'but it can be varied therefrom if desired. By constantlymaintaining the fuel tank N under a small or initial pressure, fuel willbe supplied to the burner or firechamber at all times, whether the powerfuel pump is working or not.

The construction described is also advantageous because onlyv arelatively. small amount of fuel is under high pressure, hence thedanger due to broken pipes, particularly if gasolene is employed, isreduced to aminimum. The system is so arranged that there are twoconnectionsv from the tank to the burner. One of these connectionsincludes the power ump L-while the other connection inclu es theregulator L. When the diaphragm L of the regulator is raised, fuelpasses directly from the tank'to the burner, but when the diaphragm isseated, the fuel passes through the power pump. When the pressure due tothe pump and that of the supply tank are somewhat nearly equal, both ithe steam inlet pipe F.

' upper end of the rack Q The rack is moved by a'pinion that isconnected to a lever or other suitable actuating device. 7 The burnershown forms the subject matter of 'a separate application filed by meJanuary 28, 1901, bearing Serial No. 45,028. Tests made with a vehicleequipped in accordance with my invention show that under various runningconditions the steam pres sure on the engine will vary proportionatelywith 'the work to be performed, it being greatest when running on alevel at fast speed or when ascending a steep grade.

The speed of the vehicle can be accurately controlled by the opening andclosing of the throttle, providing the boiler pressure is .maintainedpractically constant.

There exists therefore a definite ratio between'the steam p essurenecessary to turn the engine and the pressure necessary on the burner,which ratio is constantithrough a very wide range and covers allpractical conditions.

The general operation of my invention is as follows: The burner is firstheated by a torch or other auxiliary device, after which the fuel in.the tank N is put under a small air pressure which forcesthe oil throughthe pipes K K and. K, thence through the vaporizer to the orifice in thepart 1. There being n'ii steam pressure in the pipe M at this time, thediaphragm L will rise against the weight of the piston L and ermit thefuel to flow to the burner. l fter t e boiler has been sufiicientlywarmed,-water is pumped into the boiler by the manually actuated pump 0,and as soon as. turned into steam is admitted to the engine through thepipe F and,

throttle G. As soon as the engine starts into operation both water andfuel pumpsbefgin to act and force water into the boiler on/one hand andoil into the burner on the other.

As the demand on the boiler for steam in.

creases, due to any cause, the amount of.

water flowing back to the water tank through the relief-valve orregulator V decreases.

The more the throttle is opened the nearer the steam pressure of theengine will be to that of the boiler, and consequently thepressure onthe piston L will be increased; In

' other words, the overflow valve of the oil supply will be weighted anda greater pressure VVlll, therefore be exerted on the fuel ser vice andmore fuel. will be consumed in the itle the diaphragm is more or lessfirmly scatburner. Closing the throttle G will cut off I a comparativelyhigh pressure, even after the pump I'has ceased to operate. As soon asthe pressure drops to that of the fuel tank the amount of fuel which isforced through the burner will be greatly reduced, but a Sllffk' cientamount, due to the pressure created by the hand pump N will flow tomaintain the vaporizer and the boiler tubes at a temperature-forimmediate starting. On account of the exhaust passing through thechamber D and'the down flue 'D any increase in the amount of the exhaustwill correspondingly increase the draft on the burner. As the amountofsteam admitted .to the engine is decreased, the draft on the burner issimultaneously and correspondingly decreased. This means that the drafton the burner is automatically varied to meet the conditions of service.Hence there will be no choking of the fire gases within the boiler underany conditions. With this method of control, the operator is entirelyfree from care as regards the fire and the steam pressure, the fireautomatically increasing With the duty-performed by the carriage, andvice versa. 7

When the systemis running, the water pump H furnishes an excess ofWater, which excess is taken care of by the adjustable relief} valve V.VVhenthe engine is making a great" demand on the boiler for steam verylittle Water returns to the tank, but as the demand for steam decreasesmore and more water will forceits Way through the valve and back i tothe tank. YVhile under running conditions it is evident that thepressure on the steam side of the regulating valve L must vary due tomomentary changes in steam pressure on the engine, caused by changes inspeed. or load, consequently: the amount of oil which flows from thepump to the burner is varied; If the pressure is low the diaphragm willrise and therewill be a local oil circulation, but as soon as more steamis admitted to the engine by opening the throted over the end of pipe Kand more oil is forced to the burner.. 1

Those features. of my invention relating to the fuel system alone havebeen divided out at the requirement of the U. S. Patent Office under theprovisions of Rules 41 and 42, and form the subject matter of adivisional application, Serial No. 157,546, filed May 18, 1903.

In accordance with the provisions of the patent statutes, I havedescribed the principle of operation of my-invention, together supplyingfuel to the burner which is unde the control of the engine pressure.

2. In combination, a boiler, a burner I I therefor, an engineconnectedwith the boiler,

a pump for supplying liquid to the boiler, means cooperating withthe'pu'm'p for rendering=its efiective delivery dependent upon theboiler pressure, a pump for supplying furl to the burner, and means forrendering the t effective delivery of the fuel pump dependent upon theengine pressure.

.3. In combination, a boiler, a burner,

' pumps-for supplying water and fuel respectively to the oiler andburner, an engine which is connected with thepumpsfor driv-' ing thesame, means for controlling the effective delivery of the water pumpaccording to the lpressure in the boiler, and-means for contro 'ng theoutput of the fuel pump according to the steam pressure of the engine.

l/In combination, a boiler, a burner therefor,jpumps for supplying waterto the boiler and fuel to the burner, an engine, driving connectionsbetween the engine and,

I pumps which permit the supplies of the pumps to vary as the speed ofthe englne varies, and means under the control of the steam pres--sureof the engine which variesthe amount of fuel supplied to the burnerindependently of variations in the action of the pump.

5. In a power generating system, the com bination of P boiler, a burnertherefor, an en-' gine, pumps tending to supply liquid to the boiler andfuel to the burner in definite proportion, means intermediate the'pump'and I boiler for varying the supply of liquidto the latter, and meansindependent of the first means and dependent upon the engine pres surefor varying the supply of fuel to the burner. M v

6. In a system of power generation, the' combination of a boiler, aburner therefor, an

engine, um tendin to sn 1 li uid to the boildi an d fuel to %he burllgrin definite proportion, and means operating inde ends ent y forvaryingthe supplies. of liqui and fuel; one of said means being-dependent uponthe engine pressure. I 7. In a system of power generation, thecombination of a boiler, aburner therefor, an

liquid to the boiler and fuel to the burner in 8. In combination, anengine, a boiler controlled by- I from opposite sides of the whichrequires that water shallbe continu'-" ously pumped into it, a Waterpump which is driven by the engine and works against thepressure on thewater-endof the boiler, a res lief valve for the pump, a burner, a fuelpum which is also driven by the engine, a

regu ator therefor, whichis controlled by the 'steampressure on theengine side of the throttle, and a throttle-valve which admits steam tothe engine and regulator and also controls the pressure on the Water endof the boiler.

9. In apower generating system, the combination of a boiler, meansincluding a regulating device for supplyin' water to the boiler, andmeans for supp liquid fuel to the boiler including a regu ating valvehaving an inlet. and an outlet, a-diaphragm for controllingfthe'connectionbetween theinlet and outlet and a pressure actuated devicefor moving the. diaphragm.

10. In av power generating system, the combination of aboiler, meansincluding. a regulating-device. for supplying water to the boiler,means'including conduits for. su plying'liqui'd fuel to; the boiler, anda regu ator for the fuel supply located in one of the conduitscomprising a diaphragm which under the influence of the fuel pressuretends to keep the conduit open and a piston actuated by the enginepressure which tends to-move the diaphragm against the fuel pressure toclose the conduit.

H. In a ower generating system, the combination of'a boiler, a pumpsupplying water to the boiler, and means for su ply-ing fuel to theboiler including a regulating valve comprising fadiaphrag'm, a seat, andmeans for moving the diaphragm relative to the seat; to control the flowthrough the valve.

12. In a power generating system, the combination of an engine, 'aboiler which furnishes steam to the engine, a pump supplying water to'the boiler, and means for supplying fuel to the boiler including a.reguating device comprising a base having a chamber With inlet andoutlet openings'and an annular seat surrounding one of the openings, adiaphragm mounted in the base above the seat, a cylinder secured to thebase-above the diaphragm, a piston in the cylinder having its lower endin engagement with the diaphragm, and a connection for admitting eng nepressure to the cylinder tocause the piston to remove the diaphragmrelative to the seat to regulate the flow through the chamber. engine, athrottle, pumps tending to supply a fuel tank maintained under aninitial pres- 13. In a power system, the combination of automaticregulator controlled by the de-' sure, a fire chamber to which fuelflows under the pressure in the tank, a generator heated by thefirechamber, an engine receiving vapor from the generator, means forsupplying fuel to the fire chamber at a pressure greater than that onthe source, and an automatic controlling valve working underthe enginepressure for regulating the supply of fuel at .the'different pressuresto the fire chamber! 14. In a power system, the combination of a fueltank adapted tobe maintained under an initial pressure, means forplacing the fuel tank under pressure, a burner, a boiler heated thereby,a casing which receives the fire gases from the burner and is providedwith a down-draft flue, an engine receiving steam from the boiler andexhausting into said line, a pump driven by the engine for increasingthe pressure of the fuel in the system and delivering it to the burner,and an mand for steam which decreases the supply of fuel to the burnercoincident with the decrease in the amount of exhaust from the engine.

15. In a power system, thecombination of a fuel tank, a burner, meanslocated between the tank and burner for increasing the pressure of thefuel in the system, a boiler heated by the burner, a casing for theboiler having a down-draft flue, an engine receiving steam from theboiler and exhausting into the flue, and means for increasing ordecreasing the supply of fuel to the burner according to the quantity ofsteam supplied to and exhausted from the engine.

16. In a power system, the combinationjof a fuel tank maintained underan initial presan initial pressure, a pump for placing the fuel tankunder pressure, a burner, a boiler heated thereby, an engine, athrottle-valve controlhng the supply of steam to the engine,

a second pump driven by the engine which delivers fuel to the burnerfrom the fuel tank at an increased pressure, and an automatic regulatorworking under the steam pressure on the engine side of the throttle forregulating the supply of fuel to the burner.

1 18. In combination, an engine, a boiler having a burner and supplyingmotive fluid to the engine, a source of fuel, a ump receiving fuel fromthe source and de ivermg it to the burner under high pressure, meansutili zin the engine exhaust for creating a forced draft on the burner,a valve-control ed draft.

tor heated by the burner, a vapor-consum tion device, a throttlecontrolling the supp y of vapor thereto, and a means for actuating saidvalve which is controlled by vapor pressure on the delivery side of thethrottle.

20. In a power system, the combination of a source of fuel supply, aboiler having a fire chamber, a pump receiving fuel from the source anddischarging it to the fire chamber, a conduit between the highressureside of the pump and the fire cham er, a motor receiving motive fluidfrom the boiler to drive the pump, anda regulator responsive to theinitial fluid ressure on the motor for suddenly reducing the pressure ofthe fuel trapped between the pump and the fire chamber when the pump. isshut down.

21.. In 'a'power system, the combination of a-boiler,an engine forreceiving motive fluid therefrom, means for utilizing the exhaust fromthe engine to produce a forced draft, a

burner for heating the boiler, separate supply pipes connected to theburner, means for sup lying fuel through one pipe at a relative y lowpressure, means for supplying fuel through the other pipe at arelatively high pressure, and a device depending upon the supply ofmotive fluid to the engine for cutting the high ressure fuel supply intoservice simultaneous y with the supply of motive fluid to the engine andthe opening of the forced draft and for cutting the low pressure sup 1yinto service simultaneously with the closing of the su p'ly of motivefluid to the engine andthe shutting down of the forced 22. In a powersystem for self-propelled vehicles, the combination of a boiler, anengine for driving the vehicle which receives motive fiuid from theboiler, a throttle, a source of fuel supply, a pum arranged to operateduring movement of t e vehicle which is connected with the'tank and theburner, a by-pass around the pump, and a valve in the by-pass controlledby the'pressure of the motive fluid delivered to the engine to open whenthe throttle closes. or vice versa.

' 23. In a power system for self-propelled" vehicles, the combination ofa boiler, an ena gine for driving the vehicle which receives steam fromthe boiler, a throttle for controlling the supply of steamto the engine,a

, initial pressure, a

source of fuel supply maintained under an ump driven by the enme andconnected with-the tank and the urner for supplying fuel to the latterat a high pressure, a by-pass around-the pump a valve therein throughwhich fuel passes to the burner under the pressure of the source,

, and means sensitive to the pressure of steam supplied to 'thefl enginefor opening the bypass when thethrottle closes or vice versa,

24. Ina power system for self-propelled vehicles, the combination of aboiler, an engine for driving the vehicle'which receives steam' from theboiler, a throttlefor control- Pressure, a pump driven by the engine andling the supply-of steam to the engine, a source of fuel maintainedunder'an initlal connec-tedwith the tank and the burner for supplyingfuel thereto at a high ressure, a 2 0 ,1- a'va ve therein byass aroundthe um d den y reduce the preswhich operates to su I sure on the burnerby establishing communi-- cation b'etweenthe latter and the source, and

means sensitive to the pressure of the steam -25 supplied to the engineto open the valve when the throttle closes or vice versa;

25. In a power system for self-propelled vehicles, the combination of aboiler,an en 'gine receiving. steam therefrom-which drives the vehicle,a burner for heating the boiler, a source of liquid fuel supplymaintained under an initial ressure, a pump driven by the engine whicreceivesfuel from the source andsupplies ittothe b'urner at a highpressure, a connection arrangedin shunt relation to the pump, I aregulator therein which is. adapted -to permit the pressure-on theburner to be "quicklyirelieved ,orreestablished during operation of the.ump and also to permit fuel to feed to the urner at the pressure of thesource when the pump is idle, a forced draft device which is adapted tooperate. atthe same time that fuel at high pressure is sup plied to theburner, and a throttlewhich controls the o 'eration of the engine andpum andalso t e regulatorandthe. forced dra t device.

26. In a power-system forselfpropelled vehicles, the combination ofa'boiler, anrengine receiving steam therefrom which drives the vehicle,aburner for heating the boiler, a

source of liquidfi'fuel maintained under an initial pressure, .a-pump'driven by the engine to permit .t e

which receives'fu from. thesource and sup.- plies' it to theburner at ahigh pressure,"a connectionarranged in shunt relation to the pump, a 'reulator therein which is adapted quickly relieve eration of the to feedto the urn'er at the pressure of the source when the pump is'idle, a;forced draft er reestablished during opdevice which is adaptedtofloperate atthe" same time that fuel-atjhigh pressure is sup-, pliedto the' burner, a natural draft device gine pressure falls and to reducepressure on the burner to be pump andalso to permit fuel.

which is adapted to operate at the same time that fuel at low pressureis supplied to'the burner, and a throttle which controls'the operationof the engine and pump and also the regulator and the forced draftdevice.

27. The combination of'a boiler, a burner therefor, an engine, a conduitbetween the boiler and the engine, a throttling device in the conduit, afuel pump for supplying fuel to the burner, a regulatingdevicecontrolled by the live steam pressure on the engine side 4 of thethrottle for increasing-the amount of fuelsupplied bythe pump when: thesteam pressure on the engine increases and for decreasing it when thepressure falls, and a conduit extending from a point in thefirstmentioned conduit between the throttling device and the engine forcommunicating said pressure-to the regulating device. I

28. In combination, an engine, a boiler which supplies motive fluidto'the engine, a

steam to the engine, a burner therefor, a

or close'said pump for sup lying fuel in excess, means for conveying fueto the burner, means for conveying the excess of fuel away from theburner, an -automatic regulator which advmits more fuel \to the lastmentionedmeans.

as the activeorinitial steam pressure on the tween t e engine andregulator which permits .s'aid steam pressure to actuate the regulator.

30. In combination, an engine, a'throttlevalve therefor, aboilersupplying steam'to engine falls and decreases the excess of fueldeivered to sald conveying meansas' said *engme ressure uses, and aconnection be the engine-and having a burner for heating it, a fuel pumpdriven by; the engine and .supplyingfuel to the burner, a source of fuelsupplydor the pump and burner, areg'ulator controlling the effectivedelivery of the pump, arid a steam-carrying connection eX-' tend ng froma point between the engine and throttle-valve to the regulator for theregulator. l 1

3-1. The combination Jof-a boiler having a fire chamber and a burnerpurpose .of controlling ,the action of said device in' one ofsaidconduits controlled the active or imtial engine pressure WlllCll mthefire cham ber, an engine receiving motive fluid from the boiler meanswhich tends to supply. an excess of liquid fuel' to .th burner,conduitsbetween said means and} he burner, and-Y a automaticallyregulates the amount of fuel chamber therefor, an engine receiving steamto the engine.

from theboiler, a throttle valve for controlling the admission of steamto the engine, means for supplying liquid fuel to'the fire chamber underpressure, a regulator for automatically regulating the amount of fuelsupplied to the fire chamber, and means for actuating the regulator bylive steam received from the engine side of the throttle.

33. In a system of control, the combina' tion'of an-engine, a source offuel supply, a boiler having a fire chamber, conduits between the sourceand the chamber, and a means in said conduits for regulating they supplyof fuel to the chamber, which means isunder the controlofthe active orinitial engine pressure and increases the supply as said pressure risesand decreases it as it falls.

34. In a system'jof controlfor a steamactuated apparatus, thecombination of an engine, a boiler supplying steam to the'en gine, anoil pump driven by the engine, auxiliary means for giving an initialoil. pressure, a regulator for the pump, and a con nection eXtendin froma point between the main'throttle vave and the engineto the regulatorfor the purpose of controlling its action by-the pressure of the steamsupplied 35. Thecombination ofan engine, a boiler having a burner forsupplying steamto the engine, a fuelcircuit, a fuel pump actuated by theengine and capable of'supplying an excess of fuel for the burner, avalve situated in the fuel circuit and arranged to vary the amount offuel delivered by'th'e pump to theburner, and means acted upon by theinitial steam pressure of the en me for regulating the opening andclosing 0 the valve.

- -36. In a system of control, the-combination of an engine,'a throttlefor controlling the supply of steam to the en ine, a'pump actuated bythe engine, a regu ator for controlling the effective delivery of thepump which is acted upon by the livesteam pressure on the engine side ofthe throttle, and a connection extending from a point between thethrottle and the engine to the regulator. for communicating saidpressure to the latter.

37. The combination of asteam generator, an engine, athrottle-controlling thesupply of steam thereto,'a burner incooperativerelation to the generator, and separate means which operateone at a time for suppoying different quantities of fuel to the burner;according to the operative or inoperative position of the throttle. f

38. The combination of a steam generator, an engine receiving steamfromthe'generator, a throttle for controlling the supply of generator, meansfor delivering fuel to the burner for supplying a main flame during openposition of the throttle, and a. means which is automatically madeoperative when the other means is made inoperative or vice versa fordelivering fuel to the burner to supply a pilot flame during closedposition of the throttle.

39. The combination of a steam generator,

crvoir, a pump connected with the reservoir and delivering fuel to theburner, means for operating the pump from the motor, 'a' throttlingdevice controlling the supply of motive fluid to the motor, and meanssensitive to the pressure on the motor side of said device forcontrolling the supply of fuel to the burner independently of thespeedof the motor.

41. Ina powersystem, the combination of a single source of liquid fuelsupply under an initial pressure, a burner, a controllable means forcreating a forced drafton the same, means for supplying fuel from saidsource to the burner at a definite pressure, and means dependent uponthe means for crca'ting'a forced draft for permitting fuel to returnfrom .the burner'to the'source when .the latter means ceases operating.42. In combination, a burner, a casing therefor, a natural draft flueand a forced draft flue communicating with the casing, means forinducing a forced draft, means for supplying fuel to the burner, and ameans dependent upon the means for creating a" forced draft whichincreases the ressure. on 'the burner at the time the forced draftbegins to operate, and relieves the pressure on the burner when theforced'draft ceases and the natural draft begins to operate. w 43. In apower system for self-propelle vehicles, the, combination of a burner, asource'of liquid fuel supply maintained under an initial pressure, apump and connections between thesource and the burnerfor supplying fuelto the latter ata high pressure, a connection arranged to convey fuelfrom ,the tank to the burner when-the pump is idle or from the burner tothe tank when the too pressure on the latter is above that on the steamto the engine, a burner for heating the :said connection and themeansforcreatmg a forced draft so as to permit fuel to flow from the burnerto the'tanksimultaneou'sly with the cessation of the'forced draft. v

44. In a power system for self-propelled vehicles, the combination of aburner, a' source of liquid fuelsupply maintained under an initial alrpressure,.a pump and connec tions between the source and the burner forsupplying fuel .to the latter at a high pressure forsu porting a mainflamegmeansforf creating a forced draft on the 'mam flame, a connectlonextendmg 1n shunt relation to the pump to form a by-pass around thelatter, a valve therein which when open permits fuel to pass to theburner at the pressure on the source to maintain the flame in bankedcondition and when closed prevents the fuel delivered by the pump IIOIIlby-passin and means for providing a natural draft or the flame when inbanked condition.

\ 45. In combination,. a' burner, a conduit connected therewiththroughwhich fuel is supplied to the burner at a suitable pressure,

a device employing fluid under pressure for creating a forced draft onthe burner, a source of fluid pressure connected with said device, and amanually-controlled means for quickly relieving the pressure onthe. fuelin said-conduit while simultaneously cutting off the supply of fluid tosaid forced draft device.

46. In combination, a burner, separate means. which operate reciprocallyto supply fuel to the ,burner at different pressures,

means for creatinga forced draft on the* burner, and means whichsimultaneously interrupts-the fuel su ply of higher and stops the forcedraft an .at t e same time opens the fuel supply. of lower pressure..

47 In combination, aburner,-- separate means which operate reciprocallyto supply.

fuel to the burner at.different 'ressures,

means for creating a forced dra t on the burner, and meanswhich operates'to stop the forced. draft: and to-simultaneously in. terrupt one fuelsupply. and open the other thereby permitting the pressure on. the

burnerto be relieved at the time the forced draft ceases operating. 5 v

48. In combmatlon, a burner, a casln therefor, a natural draft flue anda force draft flue communicating with'the interior of the casing,.meansfor inducing a forced draft,

means for supplying fuel to the burner, and a manually controlled meanswhichfsimultaneouslyregulates the forced draft and'the fuel su ply. 149. n combination, a burner,-- a .casin therefor, a natural draft flueand aforce draft flue'communicating with the interior of .the casing,means for inducing'a forced draft, means for supplying fuel to theburner at high pressure, means for supplying fuel at a lower pressure,and means comprising coop.-

1 v erati ng devices which simultaneously renders operative" the meansf0 inducing a'forced draft and the means for u lying fuel to the burnerat high ressure Wlill e rendering the;

means for supp ying fuel at lower pressure "inoperative, or vice versa.

